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Treasury Shares - Additional Information (Detail)
$ / shares in Units, ¥ in Thousands, $ in Millions
Dec. 31, 2021
USD ($)
$ / shares
shares
Dec. 31, 2021
CNY (¥)
shares
Dec. 31, 2020
shares
Oct. 08, 2015
$ / shares
Statement [Line Items]        
Stock repurchase program, Number of shares authorized, Value | $ $ 1,000      
Stock repurchase program, Number of shares repurchased | shares 107,000,000 107,000,000 54,000,000  
Stock repurchase program, Number of shares repurchased, Value $ 864 ¥ 5,560,000    
Par value per share | $ / shares       $ 0.00001
Treasury shares [member]        
Statement [Line Items]        
Exercise of share-based payment, Shares | shares 2,219,927 2,219,927    
Par value per share | $ / shares $ 0.00001      
Treasury shares issued under share based payment | ¥   ¥ 143